There is a colour shift between the Kodak chems used at 20 C and at normal temp. I'm not sure if this is due to the temp or to no starter solution, or a combination of both. I just use them as basicly one shot with drums at 20-22C and 2 min processing time, the process is very repeatable. I haven't tried the normal temp for processing yet, and I don't even see a need to try it.